AKA: HEMA acetoacetate, 2-Hydroxyethyl methacrylate acetoacetate
Ingredient · Film Forming · EWG: 4
Synthetic
Occlusive
Not Clean
Hydroxyethylmethacrylate acetoacetate is a cosmetic ingredient. Assessed as safe by the CIR.
Form
Liquid
See origin →
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Traditional Use
A synthetic polymer precursor developed in the late 20th century for use in cosmetic formulations. No traditional use; created as a cross-linking agent and film-former in modern skincare and personal care products.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
EWG
4
CIR
Safe as used
Pregnancy
Caution
CIR Safety Findings
medical-approval
all-shades-safe
Concentration Guide
Industry Max
Industry typically uses up to 79.0% in leave-on products (17 products reported). Source: CIR Safety Assessment (CIR Seq 845).